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Bug 187993

Summary:	The IDE hangs whilst in the middle of editing a file, cpu goes to 99% and ends up with having to kill the process.
Product:	editor	Reporter:	petermount <petermount>
Component:	Hints & Annotations	Assignee:	issues@editor <issues>
Status:	RESOLVED INCOMPLETE
Severity:	normal	Keywords:	RANDOM, THREAD
Priority:	P3
Version:	6.x
Hardware:	Macintosh (x86)
OS:	Mac OS X
Issue Type:	DEFECT	Exception Reporter:
Attachments:	The netbeans log of the session up until the crash Thread dump of NetBeans 6.9 whilst locked

Description petermount 2010-06-23 11:24:29 UTC

Product Version = NetBeans IDE 6.9 (Build 201006101454)
Operating System = Mac OS X version 10.5.8 running on x86_64
Java; VM; Vendor = 1.6.0_20
Runtime = Java HotSpot(TM) 64-Bit Server VM 16.3-b01-279

What I did was to copy an existing class then editing it to convert it into an interface that the existing one was going to implement.

The editor then hung and the cpu went to 99% on one core and after a couple of minutes I ended up killing the process.

In the log I could see there were reported problems with FoldManager and HtmlRenderer at the time of the crash.

Comment 1 petermount 2010-06-23 11:25:37 UTC

Created attachment 100358 [details]
The netbeans log of the session up until the crash

Comment 2 Peter Pis 2010-06-23 14:36:37 UTC

Could you please take and attach thread dump while you run into this? Thanks.
http://wiki.netbeans.org/GenerateThreadDump

Comment 3 petermount 2010-06-25 15:50:13 UTC

Created attachment 100421 [details]
Thread dump of NetBeans 6.9 whilst locked

Ok here's a thread dump as I've managed to get it to hang again.

This time it was while creating a new class and running auto import

Comment 4 Vitezslav Stejskal 2010-07-09 07:34:05 UTC

This is strange. The thread dump shows that the only thread with some activity is AWT-EventQueue-1, but it's not blocked. At the time of taking the threaddump it was rendering the editor error stripe. No other threads seem to do anything. In the log file there is an exception from maven, but it's probably unrelated. Could you please generate more threaddumps (eg. several consecutive dumps in approx 1s succession)? Thanks

Comment 5 petermount 2010-07-09 07:41:17 UTC

Up until that last thread dump it was happening every few days, however it's not done it since - although it has had several real go-slows which I thought was the same, but it then recovered.

I had a look at the dump myself and couldn't see anything either. If it happens again then I'll do another dump.

One thing I have observed however, you mentioned maven - I use maven exclusively and a lot of the go-slows do happen just after a maven build. Some of my maven builds are pretty big so that may not necessarily be unrelated after all.